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43 lines
536 B

package solutions
func ifNegative(a []string, n int) int {
if n < 0 {
n = len(a) + n
}
if n < 0 {
n = 0
} else if n > len(a) {
n = len(a)
}
return n
}
func Slice(a []string, nbr ...int) []string {
if len(nbr) == 0 {
return a
}
first := nbr[0]
if len(nbr) == 1 {
if first < 0 {
first = len(a) + first
if first < 0 {
return a
}
}
return a[first:]
}
second := nbr[1]
first = ifNegative(a, first)
second = ifNegative(a, second)
if first > second {
return nil
}
return a[first:second]
}